na.action               package:stats               R Documentation

_N_A _A_c_t_i_o_n

_D_e_s_c_r_i_p_t_i_o_n:

     Extract information on the NA action used to create an object.

_U_s_a_g_e:

     na.action(object, ...)

_A_r_g_u_m_e_n_t_s:

  object: any object whose 'NA' action is given.

     ...: further arguments special methods could require.

_D_e_t_a_i_l_s:

     'na.action' is a generic function, and 'na.action.default' its
     default method.  The latter extracts the '"na.action"' component
     of a list if present, otherwise the '"na.action"' attribute.

     When 'model.frame' is called, it records any information on 'NA'
     handling in a '"na.action"' attribute.  Most model-fitting
     functions return this as a component of their result.

_V_a_l_u_e:

     Information from the action which was applied to 'object' if 'NA's
     were handled specially, or 'NULL'.

_R_e_f_e_r_e_n_c_e_s:

     Chambers, J. M. and Hastie, T. J. (1992) _Statistical Models in
     S._ Wadsworth & Brooks/Cole.

_S_e_e _A_l_s_o:

     'options("na.action")', 'na.omit', 'na.fail', also for
     'na.exclude', 'na.pass'.

_E_x_a_m_p_l_e_s:

     na.action(na.omit(c(1, NA)))